13431431230221 has 48 divisors (see below), whose sum is σ = 19172787499008. Its totient is φ = 8361671136000.

The previous prime is 13431431230201. The next prime is 13431431230223. The reversal of 13431431230221 is 12203213413431.

It is not a de Polignac number, because 13431431230221 - 2¹⁵ = 13431431197453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431431230223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1039336666 + ... + 1039349588.

It is an arithmetic number, because the mean of its divisors is an integer number (399433072896).

Almost surely, 2^{13431431230221} is an apocalyptic number.

It is an amenable number.

13431431230221 is a deficient number, since it is larger than the sum of its proper divisors (5741356268787).

13431431230221 is a wasteful number, since it uses less digits than its factorization.

13431431230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22242 (or 22225 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 13431431230221 its reverse (12203213413431), we get a palindrome (25634644643652).

The spelling of 13431431230221 in words is "thirteen trillion, four hundred thirty-one billion, four hundred thirty-one million, two hundred thirty thousand, two hundred twenty-one".